2016317 - BSEG conversion error in PARCONV_UPG phase

PARCONV_UPG was terminated due to following conversion error:

NCONV00.C13:

2 EGT282 Projection view "V_QCMBSEG" was deleted
3 EGT279XProjection view "V_QCMBSEG" for data transfer will be created
4EEAD857 "V_QCMBSEG"-"ABSBT" (specify reference table AND reference field)
4EEAD857 "V_QCMBSEG"-"BDIF2" (specify reference table AND reference field)
4EEAD857 "V_QCMBSEG"-"BDIF3" (specify reference table AND reference field)

.....

4EEAD857 "V_QCMBSEG"-"WSKTO" (specify reference table AND reference field)
4WEDT135 Flag: 'Incorrect enhancement category' could not be updated
4EEMC666 View structure "V_QCMBSEG" could not be activated
2EED0800 "STEP 2": Operation "CREATE_PROJECTION_VIEW" failed
2EEGT239 Error in step "BSEG-STEP2"
4 EGT253XTotal time for table "BSEG": "000:00:01"
2EEGT094 Conversion could not be restarted
2 EGT067 Request for "BSEG" could not be executed
1 ED0302X=========================================================================
1 ED0314 DD: Execution of Database Operations
1 ED0302 =========================================================================
1 ED0327 Process..................: "hqdc1_10_14811820"
1EED0319 Return code..............: "8"

KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , BC-DWB-DIC-AC , ABAP Dictionary Activation and Conversion , Problem